2022-10-21 22:24:49 +00:00
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From 14aa8b2d5c2ebead01b542f62d68029023054774 Mon Sep 17 00:00:00 2001
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From: Yu Zhao <yuzhao@google.com>
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Date: Wed, 28 Sep 2022 13:36:58 -0600
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Subject: [PATCH 1/1] mm/mglru: don't sync disk for each aging cycle
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wakeup_flusher_threads() was added under the assumption that if a system
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runs out of clean cold pages, it might want to write back dirty pages more
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aggressively so that they can become clean and be dropped.
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However, doing so can breach the rate limit a system wants to impose on
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writeback, resulting in early SSD wearout.
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Link: https://lkml.kernel.org/r/YzSiWq9UEER5LKup@google.com
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Fixes: bd74fdaea146 ("mm: multi-gen LRU: support page table walks")
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Signed-off-by: Yu Zhao <yuzhao@google.com>
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Reported-by: Axel Rasmussen <axelrasmussen@google.com>
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Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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---
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mm/vmscan.c | 2 --
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1 file changed, 2 deletions(-)
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--- a/mm/vmscan.c
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+++ b/mm/vmscan.c
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2022-12-08 13:32:44 +00:00
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@@ -4007,8 +4007,6 @@ static bool try_to_inc_max_seq(struct lr
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2022-10-21 22:24:49 +00:00
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if (wq_has_sleeper(&lruvec->mm_walk.wait))
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wake_up_all(&lruvec->mm_walk.wait);
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- wakeup_flusher_threads(WB_REASON_VMSCAN);
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-
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return true;
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}
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